11138868 has 36 divisors (see below), whose sum is σ = 30323748. Its totient is φ = 3427200.

The previous prime is 11138843. The next prime is 11138891. The reversal of 11138868 is 86883111.

It can be written as a sum of positive squares in 2 ways, for example, as 4848804 + 6290064 = 2202^2 + 2508^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11433 + ... + 12368.

Almost surely, 2^11138868 is an apocalyptic number.

11138868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11138868 is an abundant number, since it is smaller than the sum of its proper divisors (19184880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11138868 is a wasteful number, since it uses less digits than its factorization.

11138868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23824 (or 23819 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 11138868 is about 3337.4942696580. The cubic root of 11138868 is about 223.3299759402.

The spelling of 11138868 in words is "eleven million, one hundred thirty-eight thousand, eight hundred sixty-eight".